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1. 发明申请

US20230098914A1 SEAT BACK FRAME FOR AUTOMOBILE AND METHOD FOR MANUFACTURING THE SAME 有权
公开(公告)号：US20230098914A1
公开(公告)日：2023-03-30
申请号：US17930449
申请日：2022-09-08
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
发明人： Masatoshi YOSHIDA
IPC分类号： B60N2/68
摘要： A seat back frame for automobile includes a first side frame and a second side frame that are arranged apart from each other in a vehicle width direction, an upper frame that connects an upper end portion of the first side frame and an upper end portion of the second side frame, and an upper bracket that is attached to the upper end portion of the first side frame and guides a seat belt. The first side frame is an extruded material extending in a vehicle vertical direction, and has a fixed lower end portion. The first side frame has a closed cross-section portion in a cross-section perpendicular to the vehicle vertical direction. The upper end portion of the first side frame is crushed rearward of a vehicle, and a thickness of the upper end portion in a vehicle front-rear direction is smaller than that of the lower end portion.

2. 发明申请

US20230040459A1 HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT DELAYED FRACTURE RESISTANCE 有权
公开(公告)号：US20230040459A1
公开(公告)日：2023-02-09
申请号：US17790890
申请日：2020-12-28
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： Kosuke SHIBATA , Junichiro KINUGASA , Keisuke NAKATA , Atsuhiro SHIRAKI
IPC分类号： C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/00 , C22C38/08 , C22C38/14 , C22C38/16 , C21D8/02
摘要： A high-strength steel sheet with excellent delayed fracture resistance, having a tensile strength of 1700 MPa or larger, including a predetermined component composition, having a martensite structure whose ratio accounts for 95 area % or more of the entire metallographic structure, and having a transition metal carbide whose ratio accounts for 0.8 volume % or more of the entire metallographic structure.

3. 发明申请

US20230032662A1 METAL COMPOSITE MATERIAL AND METHOD FOR PRODUCING METAL COMPOSITE MATERIAL 有权
公开(公告)号：US20230032662A1
公开(公告)日：2023-02-02
申请号：US17789074
申请日：2020-12-18
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
发明人： Yoshihaya IMAMURA , Chieko IMAI
IPC分类号： B22D21/04 , C22C21/00
摘要： Provided are: a metal composite material in which a metal material and an aluminum casting are integrated with one another so as to exhibit high adhesion strength; and a method for producing the same. The metal composite material has a metal material and an aluminum casting which is layered on the metal material. Projecting alloy sections of the metal material which have a higher melting point than does the aluminum casting are formed on the surface of the metal material. The aluminum casting covers the surface of the metal material and is tightly adhered to the projecting alloy sections.

4. 发明申请

US20230032384A1 COOLING DEVICE 有权
公开(公告)号：US20230032384A1
公开(公告)日：2023-02-02
申请号：US17758993
申请日：2020-05-15
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
发明人： Kenichiro MITSUHASHI , Yasuhiro MITARAI , Jong Yoon CHO
IPC分类号： F25J1/02 , F28D1/06 , F25J5/00 , F25J1/00
摘要： Provided is a cooling device with which it is possible to cool a fluid to be cooled, even before maintenance work, if a fault such as a blockage or a breakage occurs in a part of a channel. The cooling device (1) is provided with four heat exchangers (1A-1D) and a plurality of heat exchanger connection parts (111-120), each of the heat exchanger connection parts allowing natural gas to flow therethrough. Each of the heat exchangers has: a drum (101, 102, 103, fourth drum 104), a refrigerant reservoir (T), a plurality of heat exchanger core parts (121, 122, 123, 124) immersed in liquid propane in the refrigerant reservoir (T), and a demister (106). A plurality of cooling channels allowing natural gas to flow therethrough are installed, independent of each other, from the first heat exchanger (1A) to the fourth heat exchanger (1D).

5. 发明申请

US20220403477A1 BLAST FURNACE OPERATION METHOD 有权
公开(公告)号：US20220403477A1
公开(公告)日：2022-12-22
申请号：US17779384
申请日：2020-11-27
申请人： NIPPON STEEL CORPORATION , JFE STEEL CORPORATION , KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) , NIPPON STEEL ENGINEERING CO., LTD.
发明人： Hiroshi SAKAI , Kaoru NAKANO
IPC分类号： C21B7/16 , C21B7/00 , C21B5/06
摘要： According to a certain viewpoint of the present invention, there is provided a blast furnace operation method comprising blowing a high-concentration hydrogen-containing gas containing 80 mol % or more of hydrogen gas from a tuyere under: a condition in which a blowing temperature of the high-concentration hydrogen-containing gas is room temperature or higher and 300° C. or lower and a gas volume of the hydrogen gas in the high-concentration hydrogen-containing gas is 200 Nm3/t or more and 500 Nm3/t or less; a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is higher than 300° C. and 600° C. or lower and the gas volume of the hydrogen gas in the high-concentration hydrogen-containing gas is 145 Nm3/t or more; a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is higher than 600° C. and 900° C. or lower and the gas volume of the high-concentration hydrogen-containing gas is 125 Nm3/t or more, or the like.

6. 发明申请

US20220389527A1 METHOD FOR PRODUCING MOLTEN STEEL 有权
公开(公告)号：US20220389527A1
公开(公告)日：2022-12-08
申请号：US17775502
申请日：2020-11-11
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)
发明人： Koji TOKUDA , Tsuyoshi MIMURA
IPC分类号： C21B11/10 , C21C1/00
摘要： In a method for producing a molten steel according to one aspect of the present invention, the solid-state direct reduced iron contains 3.0% by mass or more of SiO2 and Al2O3 in total and 1.0% by mass or more of carbon. A ratio of a metallic iron to the total iron content contained in the solid-state direct reduced iron is 90% by mass or more, and an excess carbon content Cx is 0.2% by mass or more to the carbons contained in the solid-state direct reduced iron. The method includes a step in a first furnace of melting 40 to 100% by mass of the solid-state direct reduced iron, and separating a molten pig iron having a carbon content of 2.0 to 5.0% by mass and a temperature of 1350 to 1550° C. and a slag having a basicity of 1.0 to 1.4 and a step in a second furnace of melting a remainder of the solid reduced iron together with the molten pig iron separated in the first furnace and blowing oxygen onto the molten material to decarburize into a molten steel.

7. 发明申请

US20220355421A1 AUSTENITIC STAINLESS STEEL FLUX-CORED WIRE, WELD METAL, AND WELDING METHOD 有权
公开(公告)号：US20220355421A1
公开(公告)日：2022-11-10
申请号：US17624049
申请日：2020-06-24
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： Hidenori NAKO , Keito ISHIZAKI , Junichi KAWATA , Yuta KINOSHITA
IPC分类号： B23K35/30 , B23K35/02 , C22C38/50 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
摘要： An austenitic stainless steel flux cored wire may provide a welded metal having excellent cryogenic temperature toughness; a welded metal from the wire may have excellent cryogenic temperature toughness; and a welding method may involve such wire(s). An austenitic stainless steel flux cored wire in which a flux is filled in a steel-made shell. The flux cored wire may contain Si, Mn, Ni, Cr, C, P, and N in amounts each falling within a specified range relative to the entire mass of the wire, with the remainder made up by Fe and unavoidable impurities, and X1 is 17.5 to 22.0 inclusive, as calculated by formula (1): X1=[Ni]W+0.5×[Cr]W+1.6×[Mn]W+0.5×[Si]W+15×[C]W (1), wherein, in formula (1), [Ni]W, [Cr]W, [Mn]W, [Si]W and [C]W represent the contents (% by mass) of Ni, Cr, Mn, Si, and C, relative to the entire mass of the wire.

8. 发明申请

US20220349020A1 HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME 有权
公开(公告)号：US20220349020A1
公开(公告)日：2022-11-03
申请号：US17760969
申请日：2020-09-14
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： Tadao MURATA , Muneaki IKEDA , Toshio MURAKAMI
IPC分类号： C21D9/46 , C22C38/14 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00 , B32B15/01 , C23C2/40
摘要： The present invention provides a high-strength steel sheet, which can be used in various applications including automobile parts and exhibits excellent collision safety and excellent moldability, and a method for manufacturing the high-strength steel sheet. The high-strength steel sheet according to an aspect of the present invention satisfies a predetermined chemical composition and has a metallographic microstructure having ferrite fraction: 0% to 10%, MA fraction: 0% to 30%, hard phase other than ferrite and MA: 70% to 100% in terms of area proportion and retained austenite fraction: 5% to 30% in terms of volume proportion, and in the high-strength steel sheet, the skewness of IQ as analyzed by the EBRD method is −1.2 to −0.3 when the skewness is expressed by a predetermined relational expression in a case where crystal grains having a bcc structure and a bct structure are regarded as an aggregation of regions having an area of 0.05 μm2.

9. 发明申请

US20220339689A1 METHOD FOR JOINING MEMBERS 有权
公开(公告)号：US20220339689A1
公开(公告)日：2022-10-27
申请号：US17762243
申请日：2020-09-14
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： Yasuhiro MAEDA , Toru HASHIMURA , Taiki YAMAKAWA
IPC分类号： B21D39/20
摘要： A method joins members for joining a first member being cylindrical and a second member being plate-shaped and having an opening. This method includes: inserting a first member into an opening of the second member; inserting an elastic body into the first member; guiding an outer diameter side of the first member with a pair of outer dies on both sides of the second member; and compressing an elastic body in the first member with a pair of inner dies. The inner dies compress the elastic body within a range in which the outer dies are positioned.

10. 发明申请

US20220297221A1 JOINING METHOD AND JOINED BODY 有权
公开(公告)号：US20220297221A1
公开(公告)日：2022-09-22
申请号：US17639083
申请日：2020-08-20
申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
发明人： Toru HASHIMURA , Ryohei IHARA , Taiki YAMAKAWA
IPC分类号： B23K9/23 , B23K9/007 , B23K33/00
摘要： A joining method for overlapping and joining a plate-shaped portion of a first metal member and a plate-shaped portion of a second metal member, where the first metal member and the second metal member are made of dissimilar materials, includes a first step of forming an insertion hole in each of the plate-shaped portion of the first metal member and the plate-shaped portion of the second metal member, where the insertion holes communicate with each other when the plate-shaped portions of the first metal member and the second metal member are overlapped with each other, a second step of disposing a first joining member made of a metal material on a side of the plate-shaped portion of the first metal member opposite to the second metal member, a third step of inserting a second joining member made of the same metal material as that of the first joining member into the first metal member from a side of the second metal member through the insertion holes while the plate-shaped portions of the first metal member and the second metal member are overlapped with each other, and a fourth step of welding the first joining member and the second joining member and joining the first metal member and the second metal member through the first joining member and the second joining member.

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